Something for the Dodge Boys!
Read what I saw on the allis chalmers forum about fram oil filters. I am impartial, just passing gas, or facts? On Friday, I attended a Chrysler/Cummins training session for Base mechanical requir...
Forum Discussion
tin,
The aftermarket filter was not retaining any residual oil pressure. It is not uncommon that the check valve in an aftermarket filter does not meet factory specifications. I have seen cases where the aftermarket filter manufacturer sees that the canister size is the same, the threads are the same, so the filter must be the same. Unfortunately later engines are much more sensitive to residual oil pressure because of reduced clearances in some areas, increased clearances in the rods and mains and lighter oils. All of these changes are made to "free up" the engine in the search for better fuel mileage.
Randy
The aftermarket filter was not retaining any residual oil pressure. It is not uncommon that the check valve in an aftermarket filter does not meet factory specifications. I have seen cases where the aftermarket filter manufacturer sees that the canister size is the same, the threads are the same, so the filter must be the same. Unfortunately later engines are much more sensitive to residual oil pressure because of reduced clearances in some areas, increased clearances in the rods and mains and lighter oils. All of these changes are made to "free up" the engine in the search for better fuel mileage.
Randy
